You should take them off of the Chick Starter and start them on a good Chick Grower until theyre laying good (maybe 2-3 weeks into laying), incorporating oyster shell and a laying pellet or mash (16% or more). When theyre laying good, (meaning the eggs are no longer mal-shaped, soft or small) you can take them off the Grower and put them completely on the mash, scratch feed, cracked corn, etc.
I also recycle all my (cleaned, ground up) eggshells that we eat, back into their feed somewhere. Be careful not to leave too big pieces if you do this though, else the hens may take a notion to start eating their own eggs! I make sure theyre all in tiny, tiny pieces before doing this, which is best. It is a very good source of calcium for them, and can also take the place of some of the oyster shell they need.
Good luck and Happy Laying!!